package com.haojin.java;
/*
 * 单例模式的懒汉式实现
 * 
 * 
 */
public class SingletonTest2 {
public static void main(String[] args) {
	Order order1 = Order.getInstance();
	Order order2 = Order.getInstance(); 
	System.out.println(order1 == order2);
}
}
class Order{
	//1.私有化类的构造器结构
	private Order(){
		
	}
	
	//2.声明当前类对象，没有初始化
	//4.要求此对象也必须声明为静态的
	private static Order instance = null;
	
	//3.声明public，static的返回当前类对象的方法
	public static Order getInstance(){
		if(instance == null){
			instance = new Order();
		}
		return instance;
	}
	
}